We have a year old Pit Bull Mix that has destroyed every toy that we have given her. She will not play with them, she chews on them and eats them when she tears them up. I decided to buy her a Tire Biter toy because it seemed pretty durable. She had it destroyed in less than 5 minutes. I Google searched the toughest dog toy in the world, and the Hurley popped up. I bought it, and she has chewed on it religiously for 3 days now and it does not have any marks on it anywhere. The material is amazing. When she is chewing on it, you can see her teeth sink in the material, but it does not pierce it. I was impressed when it lasted 30 minutes. We will be buying more of this material toys for sure.. HIGHLY RECOMMEND!!!